JP2007307924A - Rigid electric train wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rigid electric train wire capable of highly suppressing the occurrence of electric corrosion. <P>SOLUTION: The rigid electric train wire has a support frame body 2, where a support frame K for holding a copper-made trolley wire 1 at the tip end is made of aluminum and has an approximate T shaped cross section, and a copper-made trolley wire receiving member 4 firmly fixed to the tip end part 5 of the support frame body 2. The rigid electric train wire is equipped with a copper-made ear 3 which is firmly fixed to the support frame body 2 and holds the trolley wire 1 in cooperation with the trolley wire receiving member 4. A zinc layer and a chromate treatment layer are laminated on the firmly fixed surfaces 40, 41 of the trolley wire receiving member 4 with the support frame body 2 of the ear 3 in order from the inner side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rigid train line laid in parallel with a track for supplying electricity to a train or the like during traveling.

  In a rigid train wire composed of a gantry having a substantially T-shaped cross section, a copper trolley wire, an ear for holding the trolley wire on the gantry, etc., there are some in which aluminum or aluminum alloy is used as the material of the gantry or ear. The contact portion between the copper trolley wire and the aluminum cradle / ear has a problem that galvanic corrosion occurs due to the contact between different metal materials. In this case, aluminum (which has a strong ionization tendency), which is a metal that is electrically lower than copper, is corroded.

In order to solve this problem, in the conventional rigid train line, an insulating tape is interposed at the contact portion between the gantry and the trolley wire, and the contact portion with the ear trolley wire is tin-plated. In other words, this rigid rail line has a small difference in ionization tendency between the materials by interposing tin located between copper and aluminum between the copper trolley wire and the aluminum ear. Thus, it is attempted to suppress electric corrosion (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 9-58305

However, even if the tin plating is interposed between the copper member and the aluminum member and the copper, tin, and aluminum are arranged in this order as in the past, aluminum, which is the most basic (highly ionized) metal in the end, is the result. Corrosion and generation of electric corrosion could not be suppressed to a high degree.
Further, in consideration of the situation that it becomes difficult to obtain copper such as the price of copper rising in the future, product development using materials other than copper is being promoted.

  Then, an object of this invention is to provide the rigid body line which can suppress generation | occurrence | production of an electric corrosion highly.

In order to achieve the above object, a rigid electric wire according to the present invention has an aluminum material portion and a copper material portion in which a gantry holding a copper trolley wire is fixed to each other and combined, and the copper material portion A zinc layer and a chromate treatment layer are laminated in order from the inside on the surface of the material part fixed to the aluminum material part.
Further, a tin layer may be interposed between the fixing surface and the zinc layer.

  A gantry holding a copper trolley wire at the tip has an gantry main body having a substantially T-shaped cross section, and a copper trolley wire receiving member fixed to the tip of the gantry main body, and the gantry A copper ear that is fixed to the main body and grips the trolley wire in cooperation with the trolley wire receiving member, and a zinc layer on the fixing surface of the trolley wire receiving member and the ear to the gantry main body. A chromate treatment layer is laminated in order from the inside.

  Further, a gantry holding a copper trolley wire at the tip has an aluminum gantry main body having a substantially T-shaped cross section, and a copper trolley wire receiving member fixed to the tip of the gantry main body, and A copper ear fixed to the gantry body and holding the trolley wire in cooperation with the trolley wire receiving member is provided, and tin is fixed to a fixing surface of the trolley wire receiving member and the ear with the gantry body. A layer, a zinc layer, and a chromate treatment layer may be laminated in order from the inside.

  In addition, the gantry body is sequentially connected by a copper joint splicer, and a zinc layer and a chromate treatment layer are sequentially laminated from the inner side on the surface of the joint splicer fixed to the gantry body.

  Alternatively, the gantry main body may be sequentially connected by a copper joint splicer, and a tin layer, a zinc layer, and a chromate treatment layer may be sequentially laminated from the inner side on the surface of the joint splicer fixed to the gantry main body.

The present invention has the following remarkable effects.
According to the rigid train wire according to the present invention, it is possible to highly suppress electric corrosion that occurs between the copper material portion (trolley wire receiving member) and the aluminum material portion (the gantry body). That is, by interposing zinc, which is a metal that is electrically lower than aluminum, between aluminum and copper, it is possible to highly suppress the corrosion of the aluminum material portion (the gantry body). Moreover, by forming the chromate treatment layer as the outermost layer, the corrosion resistance of the copper material portion (trolley wire receiving member) can be improved.
In addition, even if it becomes difficult to obtain copper, such as the price of copper rising in the future, the copper material part (trolley wire receiving member) and the aluminum material part other than copper (the gantry body) In combination, a frame having excellent corrosion resistance can be manufactured.
As described above, the present invention is an excellent rigid train wire that skillfully combines the electrical conductivity / corrosion resistance of copper with the lightness of aluminum and sufficiently maintains the corrosion resistance of the contact portion of different metals.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
In the first embodiment of the rigid train line according to the present invention shown in FIG. 1, K is a gantry and 1 is a copper trolley wire attached to the tip of the gantry K. The gantry K has an aluminum material part A and a copper material part C which are fixedly bonded to each other. In the figure, the aluminum material part A is an cradle body 2 made of aluminum having a substantially T-shaped cross section, and the copper material part C is This is a trolley wire receiving member 4 fixed to the tip 5 of the gantry body 2.
Reference numeral 3 denotes a copper ear. The base end of the ear 3 is fixed to the gantry body 2 and holds the trolley wire 1 in cooperation with the trolley wire receiving member 4 at the tip.

FIG. 2 is a side view of FIG. 1 and shows a state in which long base bodies 2 and 2 are sequentially connected by a joint splicer 25 having a relatively short length, and a continuous trolley wire 1 is shown. .
In FIG. 1, the joint splicers 25, 25 are pulled together by a caulking fastener comprising a hack bolt 26 and a collar 27 and fastened to the gantry body 2, and the gantry bodies 2, 2 are connected to each other. Yes. The joint splicer 25 is made of copper.

  Then, in the copper trolley wire receiving member 4 (copper material part C), the copper ear 3 and the copper joint splicer 25, the fixing surfaces 40 (50), 41, 42 to the gantry body 2 made of aluminum Composite plating. The composite plated portions (respective fixing surfaces 40 (50), 41, 42) are indicated by bold lines in FIG.

  As shown in FIG. 4A, the composite plating is obtained by laminating a zinc layer 30 and a chromate treatment layer 31 on the fixing surfaces 40 (50), 41, and 42 in order from the inside. Furthermore, as the composite plating, as shown in FIG. 4 (b), it is preferable to laminate a tin layer 32, a zinc layer 30 and a chromate treatment layer 31 in order from the inside on each fixing surface 40 (50), 41, 42.

  The case where the zinc layer 30 and the chromate treatment layer 31 are formed on the fixing surfaces 40, 41, 42 will be described in detail. The thickness dimension of the zinc layer 30 is 15 μm or less, preferably 6 μm to 10 μm. If the thickness of the zinc layer 30 exceeds 15 μm, it is not preferable from the viewpoint of current collecting characteristics. Further, the zinc layer 30 may contain Sn, Pb, Cd, Al, etc. in addition to pure zinc.

  As a method for forming the zinc layer 30, an electroplating method, a hot dipping method, a displacement plating method, an extrusion method, a pipe sinking method, and the like can be used. However, in the present invention, the electroplating method is used because the mechanical properties of the trolley wire 1 are not deteriorated. Is preferably used.

  The chromate treatment layer 31 immerses the trolley wire receiving member 4, the ear 3, and the joint splicer 25 in which the zinc layer 30 is formed in a known treatment bath such as a coating type or a reaction type mainly containing chromic acid. Formed by. In the present invention, a known chromate treatment can be applied, but it is preferable to perform a special chromate treatment comprising chromic anhydride, sulfuric acid, nitric acid and additives that are excellent in surface uniformity of the chromate treatment layer 31. The thickness dimension of the chromate treatment layer 31 is, for example, 0.3 μm.

  Further, according to the above forming method, the zinc layer 30 and the chromate treatment layer 31 are not limited to the fixing surfaces 40, 41, 42, but the outer surface of each member (trolley wire receiving member 4, ear 3, joint splicer 25). It can be freely formed as a whole.

Next, the case where the tin layer 32, the zinc layer 30, and the chromate treatment layer 31 are formed on the fixing surfaces 40, 41, and 42 will be described.
The thickness dimension of the tin layer 32 is 10 μm or less, preferably 2 μm to 6 μm. If the thickness dimension of the tin layer 32 exceeds 10 μm, it is not preferable from the viewpoint of current collecting characteristics. Furthermore, it takes a long time to form and the manufacturing efficiency is lowered.

  As a method for forming the tin layer 32, known methods such as an electroplating method, a hot dipping method, a displacement plating method, an extrusion method, and a pipe sinking method can be used. The tin layer 32 may contain Zn, Pb, Cd, Al, etc. in addition to pure tin.

The zinc layer 30 formed on the tin layer 32 is formed in the same manner as described above. The thickness of the zinc layer 30 is preferably 6 to 10 μm from the viewpoint of current collection characteristics and manufacturing efficiency.
The chromate treatment layer 31 further formed on the tin layer 32 and the zinc layer 30 is formed in the same manner as described above.
Further, the tin layer 32, the zinc layer 30, and the chromate treatment layer 31 may be formed on the entire outer surface of each member (the trolley wire receiving member 4, the ear 3, and the joint splicer 25).

In FIG. 1, a specific configuration other than that described above will be described below.
The gantry body 2 made of aluminum has a flange portion 13 attached to a non-illustrated insulator provided in the tunnel or the like on the base end (upper end in the figure) side, and has a pedestal central plane P in the vicinity of the distal end portion 5. It has a pair of convex portions 14 and 14 arranged symmetrically with respect to each other and is connected to each other by a web 15, and is manufactured by an extrusion mold material or a subsequent cold drawing process.

  The copper trolley wire 1 has a pair of V-shaped locking grooves 10 and 10 on both the left and right sides of FIG. 1, and is a substantially daruma shape in which the base end side small sector portion 16 and the distal end side large sector portion 17 are combined. It is. The trolley wire 1 has a curved convex surface 18 on the base end side.

  The trolley wire receiving member 4 includes a U-shaped attachment portion 7 having a fitting recess 6 into which the distal end portion 5 of the gantry body 2 is fitted on the proximal end side. And the trolley wire receiving member 4 is attached so that this fitting recessed part 6 and the left and right base end surfaces arrange | positioned continuously by the fitting recessed part 6 contact the mount main body 2. As shown in FIG.

  Further, the attachment portion 7 has a flat contact surface 8 with which the curved convex surface 18 of the trolley wire 1 contacts on the tip side. Further, at the tip of the attachment portion 7, a protrusion having a substantially triangular locking claw portion 11 that engages with one of the pair of locking grooves 10, 10 of the trolley wire 1 (the right side in the figure). Part 9 is formed.

  Reference numeral 19 denotes a stainless steel fastener for fixing the trolley wire receiving member 4 to the distal end portion 5 of the gantry body 2, and the fastener 19 penetrates the distal end portion 5 perpendicularly to the gantry central plane P. It is inserted into the insertion hole 21 and the two holes 20 and 20 (left and right in the figure) provided through the attachment portion 7 of the trolley wire receiving member 4. The fastener 19 is made of, for example, a rivet, a pin, or a spring pin.

  The base end of the ear 3 is disposed in contact with the left convex portion 14 in FIG. 1, and the other end of the pair of locking grooves 10, 10 of the trolley wire 1 (in the illustrated example) It has a clamping claw portion 22 that engages the left side).

Reference numeral 23 denotes a stainless steel ear fastening bolt that passes through the distal end portion 5 of the gantry body 2 and the trolley wire receiving member 4, and reference numeral 24 denotes a stainless steel bush nut that is screwed into the bolt 23.
With this bolt 23 and bush nut 24, the ear 3 is attached to the gantry body 2 and the tip of the ear 3 is pulled toward the trolley wire 1 so that the locking claw portion 11 of the trolley wire receiving member 4 and the contact surface 8 Grabbing in collaboration. The bush nut 24 abuts on the convex portion 14 on the right side of FIG. 1, and the convex portion 14 prevents the bush nut 24 from rotating.

  Further, in order to make the expansion coefficient of the copper joint splicer 25 and the hack bolt 26 substantially the same, the hack bolt 26 is made of stainless steel.

  FIG. 5 shows a second embodiment of the rigid train line according to the present invention, in which two trolley wires 1 and 1 made of copper are held at the tip of the gantry K, and the gantry K is combined with each other. It has an aluminum material part A and a copper material part C. In FIG. 5, the aluminum material portion A is an aluminum gantry main body 2 having a substantially T-shaped cross section, and the copper material portion C is a trolley wire receiving member 4 fixed to the distal end portion 5 of the gantry main body 2.

In addition, a pair of left and right copper ears 3 and 3 are provided, and the base ends of the ears 3 and 3 are attached to the gantry body 2 and the trolley wires 1 and 1 are grasped in cooperation with the trolley wire receiving member 4 at the tip. I have it.
Copper joint splicers 25, 25 are pulled together and fastened to the gantry body 2 by caulking fasteners composed of hack bolts 26 and collars 27.

  Then, in the copper trolley wire receiving member 4 (copper material part C), the copper ear 3 and the copper joint splicer 25, the fixing surfaces 40 (50), 41, 42 to the gantry body 2 made of aluminum Composite plating. The parts subjected to the composite plating (respective fixing surfaces 40 (50), 41, 42) are indicated by bold lines in FIG.

As shown in FIG. 4A, the composite plating is obtained by laminating a zinc layer 30 and a chromate treatment layer 31 on the fixing surfaces 40 (50), 41, and 42 in order from the inside. Furthermore, as shown in FIG. 4 (b), it is preferable to laminate a tin layer 32, a zinc layer 30 and a chromate treatment layer 31 in this order from the inside on each fixing surface 40 (50), 41, 42. Note that the configuration and the formation method of the tin layer 32, the zinc layer 30, and the chromate treatment layer 31 are the same as those in the first embodiment, and a description thereof will be omitted.
Further, this composite plating may be formed on the entire outer surface of each member (trolley wire receiving member 4, ear 3, joint splicer 25).

  The gantry body 2 of the second embodiment shown in FIG. 5 and the gantry body 2 of the first embodiment shown in FIG. 1 have the same cross-sectional shape, whereas the cross-sectional shape of the trolley wire receiving member 4 is It is different.

  The shape of the trolley wire receiving member 4 according to the second embodiment will be described in detail. The trolley wire receiving member 4 is integrally connected to the proximal-side substantially inverted square-shaped attachment portion 7 and the distal end of the attachment portion 7. It consists of a substantially trapezoidal ridge 9 provided.

  The mounting portion 7 has a fitting recess 6 into which the distal end portion 5 of the gantry body 2 is fitted on the base end side, and abutment surfaces 8 and 8 with which the two trolley wires 1 and 1 are in contact with the distal end side. The central plane P is disposed symmetrically. Further, a pair of (left and right) projecting piece portions 12 and 12 are provided at the distal end portion of the attachment portion 7, and the distal end surfaces of the projecting piece portions 12 and 12 form part of the contact surfaces 8 and 8.

The protruding portion 9 is disposed between the contact surfaces 8 and 8 and is a substantially triangular locking claw portion that engages with the locking grooves 10 and 10 facing each other (inner side) of the trolley wires 1 and 1. 11 and 11.
And the latching claw parts 11 and 11, the contact surfaces 8 and 8 and the ears 3 and 3 cooperate to hold the two trolley wires 1 and 1.

Reference numeral 28 denotes a bolt member penetrating the distal end portion 5 of the gantry body 2 and the trolley wire receiving member 4, and 29 is a nut member screwed into the bolt member 28.
Both the ears 3 and 3 are attached to the gantry body 2 by the bolt member 28 and the nut member 29.
In FIG. 5, the same reference numerals as those in FIG. 1 have the same configurations as those in FIG.

  FIG. 7 shows a third embodiment of the present invention, in which the joint splicer 25 shown in the second embodiment is made of aluminum. That is, the aluminum joint splicer 25 is formed thicker than the copper joint splicer 25 shown in FIGS. 1 and 5 in order to maintain strength. In addition, since electric corrosion does not occur between the aluminum joint splicer 25 and the aluminum gantry body 2, the above composite plating (tin layer 32, zinc layer 30, chromate treatment layer) is applied to the joint splicer 25. 31) Not processed.

  Moreover, the trolley wire receiving member 4 and the ears 3 and 3 are made of copper, and the above-described composite plating is applied to the fixing surfaces 40 and 41 with the gantry body 2.

  In order to make the expansion coefficients of the aluminum joint splicer 25 and the hack bolt 26 substantially the same, the hack bolt 26 is made of aluminum.

  In FIG. 7, the configuration other than that described above is the same as the configuration of the second embodiment, and thus description thereof is omitted.

  The “aluminum” means pure aluminum or aluminum alloy, and the “copper” is defined as pure copper or copper alloy.

  In addition, the rigid train line of the present invention can be freely changed according to the cross-sectional shape, number, and mounting position of the trolley wire 1 attached to the gantry K, depending on the cross-sectional shape of the trolley wire receiving member 4 and the ear 3. Further, the trolley wire receiving members 4 having a plurality of different cross-sectional shapes corresponding to the cross-sectional shape, the number, and the mounting position of the trolley wires 1 are prepared, and the aligned trolley wire receiving members 4 (as common members) are prepared. ) Alternatively, it may be configured to be selectively selected and fixed to the distal end portion 5 of the gantry body 2.

As described above, the rigid electric train wire of the present invention has the aluminum material portion A and the copper material portion C in which the gantry K holding the copper trolley wire 1 at the tip is fixed and combined with each other. Since the zinc layer 30 and the chromate treatment layer 31 are laminated in order from the inside on the fixing surface 50 of the part C with the aluminum part A, the electrolytic corrosion generated between the copper part C and the aluminum part A is highly suppressed. be able to. That is, it is possible to highly suppress the corrosion of the aluminum material portion A by interposing zinc, which is a metal that is electrically lower than aluminum, between aluminum and copper. Moreover, by forming the chromate treatment layer 31 as the outermost layer, the corrosion resistance of the copper material portion C can be improved, and the commercial value can be greatly increased.
As described above, the present invention is an excellent rigid train wire that skillfully combines the electrical conductivity / corrosion resistance of copper with the lightness of aluminum and sufficiently maintains the corrosion resistance of the contact portion of different metals.
In addition, even in the case where it becomes difficult to obtain copper such as the price of copper rising in the future, the copper material part C and the aluminum material part A other than copper are combined to have excellent corrosion resistance. The gantry K can be manufactured.

  Further, since the tin layer 32 is interposed between the fixing surface 50 and the zinc layer 30, it is possible to highly suppress the occurrence of electrolytic corrosion of the aluminum material portion A and to further improve the corrosion resistance of the copper material portion C. it can.

In addition, in the rigid train line of the present invention, the gantry K holding the trolley wire 1 made of copper at the tip is made of an aluminum gantry main body 2 having a substantially T-shaped cross section and the copper gantry 2 fixed to the tip end 5 of the gantry main body 2. A trolley wire receiving member 4, and a copper ear 3 that is fixed to the gantry body 2 and holds the trolley wire 1 in cooperation with the trolley wire receiving member 4. Since the zinc layer 30 and the chromate treatment layer 31 are laminated in order from the inside on the fixing surfaces 40 and 41 of the 4 and ear 3 with the gantry body 2, between the trolley wire receiving member 4 and the gantry body 2, It is possible to highly suppress electric corrosion generated between the gantry body 2 and the gantry body 2. That is, by interposing zinc, which is a metal that is electrically lower than aluminum, between aluminum and copper, it is possible to highly inhibit the gantry body 2 made of aluminum from being corroded. Moreover, by forming the chromate treatment layer 31 as the outermost layer, the corrosion resistance between the trolley wire receiving member 4 and the ear 3 can be improved, and the commercial value can be greatly increased.
As described above, the present invention is an excellent rigid train wire that skillfully combines the electrical conductivity / corrosion resistance of copper with the lightness of aluminum and sufficiently maintains the corrosion resistance of the contact portion of different metals.
In addition, even if there is a situation where it becomes difficult to obtain copper such as the price of copper rising in the future, the copper trolley wire receiving member 4 and the cradle body 2 made of aluminum other than copper are combined, The gantry K having excellent corrosion resistance can be manufactured.

Further, the gantry K holding the copper trolley wire 1 at the tip includes an aluminum gantry body 2 having a substantially T-shaped cross section, and a copper trolley wire receiving member 4 fixed to the tip portion 5 of the gantry body 2. And having a copper ear 3 which is fixed to the gantry body 2 and holds the trolley wire 1 in cooperation with the trolley wire receiving member 4. The trolley wire receiving member 4 and the gantry body 2 of the ear 3 are provided. Since the tin layer 32, the zinc layer 30 and the chromate treatment layer 31 are laminated on the fixing surfaces 40, 41 in order from the inside, the trolley wire receiving member 4 and the gantry body 2 and the ear 3 and the gantry body 2 It is possible to highly suppress electric corrosion that occurs during the period. That is, by interposing zinc, which is a metal that is electrically lower than aluminum, between aluminum and copper, it is possible to highly inhibit the gantry body 2 made of aluminum from being corroded. Moreover, by forming the chromate treatment layer 31 as the outermost layer, the corrosion resistance between the trolley wire receiving member 4 and the ear 3 can be improved, and the commercial value can be greatly increased. Further, since the tin layer 32 is formed in the innermost layer, the corrosion resistance between the trolley wire receiving member 4 and the ear 3 can be further improved.
As described above, the present invention is an excellent rigid train wire that skillfully combines the electrical conductivity / corrosion resistance of copper with the lightness of aluminum and sufficiently maintains the corrosion resistance of the contact portion of different metals.
In addition, even if there is a situation where it becomes difficult to obtain copper such as the price of copper rising in the future, the copper trolley wire receiving member 4 and the cradle body 2 made of aluminum other than copper are combined, The gantry K having excellent corrosion resistance can be manufactured.

  Further, the gantry main bodies 2 and 2 are sequentially connected by the copper joint splicers 25 and 25, and the zinc layer 30 and the chromate treatment layer 31 are sequentially applied from the inner side to the fixing surface 42 of the joint splicer 25 to the gantry main bodies 2 and 2. Since they are laminated, the electrolytic corrosion generated between the joint splicer 25 and the gantry body 2 can be highly suppressed. That is, by interposing zinc, which is a metal that is electrically lower than aluminum, between aluminum and copper, it is possible to highly inhibit the gantry body 2 made of aluminum from being corroded. Further, by forming the chromate treatment layer 31 as the outermost layer, the corrosion resistance of the joint splicer 25 can be improved, and the commercial value can be greatly increased.

  Further, the gantry main bodies 2 and 2 are sequentially connected by copper joint splicers 25 and 25, and a tin layer 32, a zinc layer 30, and a chromate treatment layer 31 are attached to the fixing surface 42 of the joint splicer 25 to the gantry main bodies 2 and 2. Are laminated in order from the inside, so that electric corrosion generated between the joint splicer 25 and the gantry body 2 can be highly suppressed. That is, by interposing zinc, which is a metal that is electrically lower than aluminum, between aluminum and copper, it is possible to highly inhibit the gantry body 2 made of aluminum from being corroded. Further, by forming the chromate treatment layer 31 as the outermost layer, the corrosion resistance of the joint splicer 25 can be improved, and the commercial value can be greatly increased. Further, since the tin layer 32 is formed as the innermost layer, the corrosion resistance of the joint splicer 25 can be further improved.

1 is a cross-sectional view showing a first embodiment of a rigid train line according to the present invention. It is a side view. It is a simplified diagram for explanation. It is a principal part expanded sectional view, Comprising: (a) is an expanded sectional view which shows one Embodiment of composite plating, (b) is an expanded sectional view which shows other embodiment of composite plating. It is sectional drawing which shows 2nd Embodiment. It is a simplified diagram for explanation. It is sectional drawing which shows 3rd Embodiment.

Explanation of symbols

1 Trolley wire 2 Base body 3 Ear 4 Trolley wire receiving member 5 Tip
25 Joint splicer
30 Zinc layer
31 Chromate treatment layer
32 Tin layer
40 Adhering surface
41 Adhering surface
42 Adhering surface
50 Adhering surface A Aluminum material part C Copper material part K Base

Claims (6)

  A pedestal (K) that holds a copper trolley wire (1) at the tip has an aluminum part (A) and a copper part (C) that are fixedly attached to each other, and the copper part (C). A rigid train wire comprising a zinc layer (30) and a chromate-treated layer (31) laminated in order from the inside on a surface (50) fixed to the aluminum material part (A).   The rigid electric train wire according to claim 1, wherein a tin layer (32) is interposed between the fixed surface (50) and the zinc layer (30).   A pedestal (K) holding a copper trolley wire (1) at the tip is made of an aluminum gantry body (2) having a substantially T-shaped cross section, and a copper pierced to the tip (5) of the gantry body (2). The trolley wire receiving member (4), and is fixed to the gantry body (2) and cooperates with the trolley wire receiving member (4) to hold the trolley wire (1). A copper ear (3) is provided, and the trolley wire receiving member (4) and the fixing surface (40) (41) of the ear (3) with the gantry body (2) are treated with a zinc layer (30) and chromate. Rigid train line characterized by laminating layers (31) in order from the inside.   A pedestal (K) holding a copper trolley wire (1) at the tip is made of an aluminum gantry body (2) having a substantially T-shaped cross section, and a copper pierced to the tip (5) of the gantry body (2). The trolley wire receiving member (4), and is fixed to the gantry body (2) and cooperates with the trolley wire receiving member (4) to hold the trolley wire (1). It has a copper ear (3), and a tin layer (32) / zinc layer on the trolley wire receiving member (4) and the fixing surface (40) (41) of the ear (3) with the gantry body (2) (30) A rigid train wire characterized by laminating chromate treatment layers (31) in order from the inside.   The frame main bodies (2) and (2) are sequentially connected by copper joint splicers (25) and (25), and the joint splicer (25) is fixed to the frame main bodies (2) and (2) (42). The rigid electric train wire according to claim 3 or 4, wherein a zinc layer (30) and a chromate treatment layer (31) are laminated in this order from the inside.   The frame main bodies (2) and (2) are sequentially connected by copper joint splicers (25) and (25), and the joint splicer (25) is fixed to the frame main bodies (2) and (2) (42). The rigid train wire according to claim 3 or 4, wherein a tin layer (32), a zinc layer (30), and a chromate treatment layer (31) are laminated in this order from the inside.

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